Enhancing the Security of SIGMA by IPSec

IPSec has been designed to provide an interoperable security architecture for IPv4 and IPv6. It is based on cryptography at the network layer, and provides security services at the IP layer by allowing endpoints to select the required security protocols, determine the algorithms to use, and exchange cryptographic keys required to provide the requested services. The IPSec protocol suite consists of two security protocols, namely Authentication Header (AH) and Encapsulating Security Payload...

References

I. Papadimitriou and A. S. Pomportsis, Wireless Networks, John Wiley and Sons Ltd., 2003. M.S. Obaidat and D. Green, Simulation of Wireless Networks, in Applied Systems Simulation Methodologies and Applications (M.S. Obaidat and G.I. Papadimitriou, (Eds.), Kluwer, 2003. P.Nicopolitidis, G.I. Papadimitriou, A.S. Pomports and M.S. Obaidat,' Self-Adaptive Polling Protocols for Wireless LANs A Learning-Automata-Based Approach, Proceedings of the IEEE...

Design Motivation

The IP traceback approaches, such as iTrace or the proposed probabilistic packet marking schemes, rely on observing a high volume of spoofed traffic comprised of thousands or millions of packets, so the attacker can undermine the traceback by spreading the attack traffic across many attacking hosts (also referred to as agents, slaves, or reflectors in a reflector DDoS attack (Chang, 2002)), greatly increasing the amount of time required by the traceback scheme to gather sufficient packets to...

Introduction 11 Study of Loss Rate

There are fundamental differences between wireless and wired LANs, which pose difficulties in the design of such systems and protocols (Nicopolitidis, P. et al., 2003), (Nicopolitidis, P. et al., 2002). (The wireless medium is characterized by high bit error rates (BERs) that can be ten times than that for wired LANs. Moreover, errors in wireless LANs occur in bursts, whereas in traditional wired systems errors appear randomly. Among the challenges in wireless networks are (a) wireless medium...

Secure Web Browsing Over Longdelay Broadband Networks

Assistant Vice President, Software Engineering, Hughes Network Systems 7 7 Exploration Lane, Germantown, MD 20876, USA Email jtbs tbs.tbs.edu Gurjit Singh Butalia1, Pawan Kumar Joshi2 lHughes Software Systems, Electronic City, Plot 3 , Sector Gurgoan - 220 5, Haryana, India Email gsbutalia hss.hns.com 2Hughes Sortware Systems, 27 Gandhi Sadan Mandir Marg, New Delhi - 000 , India Email pkjoshi hss. hns.com Keywords Satellite Broadband, Secure Web Browsing, Performance Analysis, HTTPS, Web...

Using ID for Marking

The proposed marking scheme overloads 25 bits space in IPv4 header the 25 bits space consists of the 16-bit Fragment Identification field, 1-bit fragmentation flag and 8-bit Type of Service (ToS) field. Employing the 25 bits in the IP header for marking was first advocated by Dean et al. (2001). The ToS field is currently not set except for extreme unusual cases. The Fragment ID field is a 16-bit field used by IP to permit reconstruction of fragments this field is commonly used as a marking...

Multimedia session handoff management

We categorize session hand-offs into two main types, session sender driven and session receiver driven. The two approaches are shown in Figures 4 and 5. Figure 4 Session sender driven approach. Figure 4 Session sender driven approach. Figure 5 Session receiver driven approach. Figure 5 Session receiver driven approach. Sender driven session hand-off is when the session sender steers the session hand-off process. In this case the sending terminal changes its current session status (i.e., play,...

Telecommunication Service Conclusion

The watermarking benchmark proposed here can be implemented for the automated evaluation of different watermarking schemes. In fact, this idea has been included in test design, and has motivated some key decisions, such as the use of a computational model of the ear instead of a formal listening test. Moreover, the establishment of an automated test for watermarking systems is an industry need, as tird-party evaluation of watermarking schemes seems to be the only objective solution to the...

Spur A Secured Protocol For Umts Registration

Manel Abdelkader and Noureddine Boudriga National Digital Certification Agency 3 bis rue d'Angleterre, Tunis RP 1000,Tunisia Email maa,nab certification.tn Keywords UMTS Release5, Registration, Authentication, IMS Security , SIP Security, Security Associations Abstract This paper presents a new scheme for mobile identification and registration in UMTS networks. Our approach attempts to alleviate different limitations observed with the current solutions (such as the 3GPP). It guarantees the...

Gender Differences In Online Shoppers Decisionmaking Styles

Institute of Business and Management, National Chiao Tung University, Sec. 1, Jhongsiao W Rd, Taipei, Taiwan(ROC) Email professor_ yang hotmail. com, wuchiachun.bm90g nctu. edu. tw Keywords Internet shopping, Decision-making styles, Gender differences, Exploratory factor analysis, Discriminant analysis. Abstract Because of the SARS epidemic in Asia, people chose to the Internet shopping instead of going shopping on streets. In other words, SARS actually gave the Internet an opportunity to...

Table Of Contents

Conference DATA MINING TECHNIQUES FOR SECURITY OF WEB SERVICES Manu Malek and Fotios TOWARDS AN ALTERNATIVE WAY OF VERIFYING PROXY OBJECTS IN JINI Nikolaos Papamichail and Luminita AN EXPERIMENTAL PERFORMANCE ANALYSIS STUDY OF LOSS RATE AND JITTER CHARACTERISTICS IN WIRELESS NETWORKS M. S. Obaidat and Yulian ON THE SURVIVABILITY OF WDM OPTICAL NETWORKS Yuanqiu Luo, Pitipatana Sakarindr andNirwan SIGMA A TRANSPORT LAYER MOBILITY MANAGEMENT SCHEME FOR TERRESTRIAL AND SPACE NETWORKS Shaojian Fu...

Gsmgprs Standard Security

The Global System for Mobile Communications GSM Figure 1 security was designed with three constraints in mind 0 a Concern of granting too much security and so bringing export problems upon GSM P GSM did not have to be resistant to active attacks where the attacker interferes with the operation of the system, perhaps masquerading as a system entity and y The trust between operators for the security operation should be minimized. The use of air interface at the transmission media allows a number...

Baseline To Help With Network Management

Mario Lemes Proen a Jr., Camiel Coppelmans State University of Londrina UEL - Computer Science Department DC - Londrina, PR - Brazil Email proenca uel.br camiel uel.br Mauricio Bottoli and Leonardo de Souza Mendes State University of Campinas UNICAMP - Communications Department DECOM FEEC - Campinas, SP - Brazil Email bottoli decom.fee.unicamp.br lmendes decom.fee.unicamp.br Keywords Computer network management, baseline, traffic characterization. Abstract This paper presents a model for...

Vertical Handoff between Heterogeneous Technologies

Figure 7 Vertical handoff using SIGMA-SN. Figure 7 Vertical handoff using SIGMA-SN. Different types of wireless access network technologies can be integrated to give mobile users a transparent view of the Internet. Handoff will no longer be limited to between two subnets in Wirless LAN WLAN , or between two cells in a cellular network horizontal handoff . In the future, mobile users will expect seamless handoff between heterogeneous access networks vertical handoff , such as WLANs and cellular...

Probabilistic Packet Marking

To avoid the network overloading, some researchers propose to embed traceback information in the IP packets, which is commonly referred to as probabilistic packet marking or simply PPM method. Savage et al. 2000 proposed to let each router mark each packet it forwards with a piece of partial path information at a set probability p e.g., p 1 20 . A message edge recording the identities of a router and its previous hop would be inscribed onto certain bits employed as marking fields in the IP...

Conclusion

A hierarchical non-adaptive diagnosis algorithm is presented for testing total N nodes of computer networks. We proposed a noble test graph with t 1 -connectivity enabling to test as many nodes as possible in a network due to a hierarchical architecture of test processes. If the maximum number of faulty nodes distributed in a network is bounded by a predefined limit t , our approach is effective. In this approach, an original monitor is placed at a key location in a network, and at first the...

The Human Auditory System HAS

Figure 2, taken from Robinson amp Hawksford, 1999 , presents the physiology of the human auditory system. Each one of its components is now described. The pinna directionally filters incoming sounds, producing a spectral coloration, known as Head Related Transfer function or HRTF . This function enables human listeners to localize the sound source in three dimensions. The ear canal filters the sound, attenuating both low and high frequencies. As a result, a resonance arises around 5 kHz. After...

Http Get Attack

For many web applications, a client should be able to send information to the server. HTML 2.0 and later versions support the Form element within an HTML document to allow data to be sent to web servers www.w3c.org . One of the attributes of Form is Method which indicates how data is submitted to the web server. Valid choices for the Method attribute are GET and POST. In METHOD GET the values inputted by the user are concatenated with the URL, separated by a special character usually fields are...